'Self sufficiency' in the Bible

That He may turn man aside from his conduct,And keep him from pride;

Then He declares to them [the true character of] their deedsAnd their transgressions, that they have acted arrogantly [with presumption and notions of self-sufficiency].

Do not be excessively righteous [like those given to self-conceit], and do not be overly wise (pretentious)—why should you bring yourself to ruin?